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<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/c30b3c1fc733487aba62d50bd51227b2/>">
	<p>How to Participate in the Course </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/16c80ecda8184aa1b8d90915eb7320ef/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/16c80ecda8184aa1b8d90915eb7320ef/>">
	<p>Technical Assistance and Contacts </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/813ef6a87f744d70a188abf9acbd97de/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/813ef6a87f744d70a188abf9acbd97de/>">
	<p>Introduction: Big Data Challenges </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/c8353451e60c41879375487f634fb893/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/7b84f82bc4ea48eaaf987af62cbe368b/c8353451e60c41879375487f634fb893/>">
	<p>Assessment 1 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
Section">
	</a>
	</li>
	</ul>
	</div>


	<div class="chapter">

	<h3 aria-label="Introduction and Use Cases">
	<a href="#
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/#>">
	Introduction and Use Cases
	</a>
	</h3>

	<ul>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/8193a6c0e225411585b4dd3c0b4db956/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/8193a6c0e225411585b4dd3c0b4db956/>">
	<p>1.0 Introduction: Use Cases </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/02cdb9691c3244ffa5fbf623c8ec712b/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/02cdb9691c3244ffa5fbf623c8ec712b/>">
	<p>1.1 Case Study: Transportation </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/bce0271f28ef460d9a56b53844e5ce6a/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/bce0271f28ef460d9a56b53844e5ce6a/>">
	<p>1.2 Case Study: Visualizing Twitter </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/6ef7384725c14876a64c357fbb292352/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/6ef7384725c14876a64c357fbb292352/>">
	<p>Assessment 2 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
Section">
	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/65b0acbcb15843979c417f77aca8aec5/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/4fc6ab65a9ea4f9e8271eae6412c24ce/65b0acbcb15843979c417f77aca8aec5/>">
	<p>Discussion 1 </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	</ul>
	</div>


	<div class="chapter">

	<h3 aria-label="Big Data Collection">
	<a href="#
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/#>">
	Big Data Collection
	</a>
	</h3>

	<ul>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/75aa593a36e542e7ad97e0a00159b761/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/75aa593a36e542e7ad97e0a00159b761/>">
	<p>2.0 Introduction: Big Data Collection </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/f57cf5f073fe4a49ac1171bc2368a3e1/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/f57cf5f073fe4a49ac1171bc2368a3e1/>">
	<p>2.1 Data Cleaning and Integration </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/0e68ff7f18e44edabf6f13a0f4a6ef3c/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/0e68ff7f18e44edabf6f13a0f4a6ef3c/>">
	<p>2.2 Hosted Data Platforms and the Cloud </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/1b964937c00e48eb8e484deed81a29b3/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/1b964937c00e48eb8e484deed81a29b3/>">
	<p>Assessment 3 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
Section">
	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/c6b0659511da4d2a9a73572c6b7e8b5d/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/6595099271994691af8eead6a5ca0144/c6b0659511da4d2a9a73572c6b7e8b5d/>">
	<p>Discussion 2 </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	</ul>
	</div>


	<div class="chapter">

	<h3 class="active" aria-label="Big Data Storage, current chapter">
	<a href="#
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/#>">
	Big Data Storage
	</a>
	</h3>

	<ul>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/13c6930644b743d2a53a2ae69a064924/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/13c6930644b743d2a53a2ae69a064924/>">
	<p>3.0 Introduction Big Data Storage </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="active ">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/
<http://./view-source_https___mitprofessionalx.mit.edu_courses_MITProfessionalX_6.BD_2X_3T2015_courseware_78ae59bfd7bf41069bdfdf7aa099db3d_57085f76dfae4e2dab671fce20dd311f__files/view-source_https___mitprofessionalx.mit.edu_courses_MITProfessionalX_6.BD_2X_3T2015_courseware_78ae59bfd7bf41069bdfdf7aa099db3d_57085f76dfae4e2dab671fce20dd311f_.html>">
	<p>3.1 Modern Databases <span class="sr">, current section</span></p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/9c33baae9cf14bce95abb7f8d5cc7ee1/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/9c33baae9cf14bce95abb7f8d5cc7ee1/>">
	<p>3.2 Distributed Computing Platforms </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/b3b1880ea89e46b5bde592e472c3da50/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/b3b1880ea89e46b5bde592e472c3da50/>">
	<p>3.3 NoSQL, NewSQL </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/beab26c075804634abbb159aeaa1cffa/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/beab26c075804634abbb159aeaa1cffa/>">
	<p>Assessment 4 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
Section">
	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/ed021647362c4de582ae6b4c73714c6d/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/ed021647362c4de582ae6b4c73714c6d/>">
	<p>Discussion 3 </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	</ul>
	</div>


	<div class="chapter">

	<h3 aria-label="Big Data Systems">
	<a href="#
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/#>">
	Big Data Systems
	</a>
	</h3>

	<ul>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/69904578eaf149ffb841574f96f80fd7/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/69904578eaf149ffb841574f96f80fd7/>">
	<p>4.0 Introduction Big Data Systems </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/4653fd747f6742daa324f3c08c5f709c/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/4653fd747f6742daa324f3c08c5f709c/>">
	<p>4.1 Security </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/e2447e9f37e0465f8e934586545fa7fb/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/e2447e9f37e0465f8e934586545fa7fb/>">
	<p>4.2 Multicore Scalability </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/2fc79f6c8bbc4abe9be0f7ff6a7e56ff/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/2fc79f6c8bbc4abe9be0f7ff6a7e56ff/>">
	<p>4.3 Visualization and User Interfaces </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/f664e8677910440a939244271f22cb9a/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/f664e8677910440a939244271f22cb9a/>">
	<p>Assessment 5 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
Section">
	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/c75e43acd2b94e0f8ed1054362ea4214/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/cd0b6c509122492a862696b37762a31d/c75e43acd2b94e0f8ed1054362ea4214/>">
	<p>Discussion 4 </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	</ul>
	</div>


	<div class="chapter">

	<h3 aria-label="Big Data Analytics">
	<a href="#
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/78ae59bfd7bf41069bdfdf7aa099db3d/57085f76dfae4e2dab671fce20dd311f/#>">
	Big Data Analytics
	</a>
	</h3>

	<ul>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/3efbb82de3f64db08041353ebe758233/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/3efbb82de3f64db08041353ebe758233/>">
	<p>5.0 Introduction Big Data Analytics </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/557e96a1dcfc4424be77e0e3e3e8b0cb/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/557e96a1dcfc4424be77e0e3e3e8b0cb/>">
	<p>5.1 Fast Algorithms I </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b711386e96374ff8850a3d2202bc35c7/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b711386e96374ff8850a3d2202bc35c7/>">
	<p>5.2 Fast Algorithms II </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/fa198c8f8c1143c684db5c610eb3138e/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/fa198c8f8c1143c684db5c610eb3138e/>">
	<p>5.3 Data Compression </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/4df4692bd31c4374ad8ff8c6b4c6d55a/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/4df4692bd31c4374ad8ff8c6b4c6d55a/>">
	<p>5.4 Machine Learning Tools </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b076ba9df7334636b3154c540b1d3209/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b076ba9df7334636b3154c540b1d3209/>">
	<p>5.5 Case Study: Information Summarization </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b6b32de820dd4465824f0294f0d06140/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/b6b32de820dd4465824f0294f0d06140/>">
	<p>5.6 Applications: Medicine </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/1075be24101b40a0b99d906892e71292/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/1075be24101b40a0b99d906892e71292/>">
	<p>5.7 Applications: Finance </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	<li class="graded">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/1a72cd3a4d684bedaacd43e9e35ef034/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/1a72cd3a4d684bedaacd43e9e35ef034/>">
	<p>Assessment 6 </p>

	<p class="subtitle">Assessment due Mar 16, 2015 at 23:30 UTC</p>

	<img src="/static/images/graded.png
<https://mitprofessionalx.mit.edu/static/images/graded.png>" alt="Graded
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	</a>
	</li>
	<li class="">
	<a
href="/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/8787282fb24f4ea88965c7d407d12cd6/
<https://mitprofessionalx.mit.edu/courses/MITProfessionalX/6.BD_2X/3T2015/courseware/e7f613740df44cfcb53a1f475f624294/8787282fb24f4ea88965c7d407d12cd6/>">
	<p>Discussion 5 </p>

	<p class="subtitle"> </p>

	</a>
	</li>
	</ul>
	</div>


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	&lt;h2&gt;Video 3.1.2&lt;/h2&gt;

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	&lt;a
href=&#34;#before-transcript_i4x-MITProfessionalX-6_BD_2X-video-2805e15c93384a29b17f965e5d183e78&#34;
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id=&#34;i4x-MITProfessionalX-6_BD_2X-video-2805e15c93384a29b17f965e5d183e78&#34;&gt;&lt;/div&gt;
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found.&lt;/h3&gt;
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aria-disabled=&#34;false&#34;&gt;&lt;/a&gt;&lt;/li&gt;
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0:00&lt;/div&gt;&lt;/li&gt;
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	&lt;h2&gt;Video 3.1.3&lt;/h2&gt;

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	&lt;a
href=&#34;#before-transcript_i4x-MITProfessionalX-6_BD_2X-video-e4787fdd82fa494896a47935e5032a05&#34;
class=&#34;nav-skip sr&#34;&gt;Skip to a navigable version of this
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aria-hidden=&#34;false&#34; aria-label=&#34;Loading video
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	&lt;/ul&gt;
	&lt;/div&gt;

	&lt;/div&gt;

	&lt;/div&gt;
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	&lt;/div&gt;

	</div>
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	&lt;h2&gt;Video 3.1.4&lt;/h2&gt;

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	&lt;h2&gt;Video 3.1.5&lt;/h2&gt;

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	&lt;h2&gt;Video 3.1.6&lt;/h2&gt;

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	&gt;
	&lt;div class=&#34;focus_grabber first&#34;&gt;&lt;/div&gt;

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	&lt;a
href=&#34;#before-transcript_i4x-MITProfessionalX-6_BD_2X-video-34c6e13e9ebb46468b629f75ad7a9b8d&#34;
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found.&lt;/h3&gt;
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	&lt;/div&gt;
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	&lt;/div&gt;

	</div>
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	&lt;h2&gt;Video 3.1.7&lt;/h2&gt;

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href=&#34;#before-transcript_i4x-MITProfessionalX-6_BD_2X-video-51ec827cfe254e9fa5ab30346812e916&#34;
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video&#39;s transcript.&lt;/a&gt;

	&lt;article class=&#34;video-wrapper&#34;&gt;
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aria-hidden=&#34;false&#34; aria-label=&#34;Loading video
player&#34;&gt;&lt;/span&gt;
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0:00&lt;/div&gt;&lt;/li&gt;
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	&lt;div class=&#34;speeds menu-container&#34;&gt;
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	&lt;h2&gt;Video 3.1.8&lt;/h2&gt;

	&lt;div
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	</div>
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	&lt;h2&gt;Video 3.1.9&lt;/h2&gt;

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	&lt;article class=&#34;video-wrapper&#34;&gt;
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aria-hidden=&#34;false&#34; aria-label=&#34;Loading video
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found.&lt;/h3&gt;
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title=&#34;Play&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34;&gt;&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;div class=&#34;vidtime&#34;&gt;0:00 /
0:00&lt;/div&gt;&lt;/li&gt;
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	&lt;div class=&#34;speeds menu-container&#34;&gt;
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	&lt;h2&gt;Video 3.1.10&lt;/h2&gt;

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	&gt;
	&lt;div class=&#34;focus_grabber first&#34;&gt;&lt;/div&gt;

	&lt;div class=&#34;tc-wrapper&#34;&gt;
	&lt;a
href=&#34;#before-transcript_i4x-MITProfessionalX-6_BD_2X-video-8c7d1d72264046d096e3ce0e45ca0ca3&#34;
class=&#34;nav-skip sr&#34;&gt;Skip to a navigable version of this
video&#39;s transcript.&lt;/a&gt;

	&lt;article class=&#34;video-wrapper&#34;&gt;
	&lt;span tabindex=&#34;0&#34; class=&#34;spinner&#34;
aria-hidden=&#34;false&#34; aria-label=&#34;Loading video
player&#34;&gt;&lt;/span&gt;
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aria-hidden=&#34;true&#34; aria-label=&#34;Play video&#34;&gt;&lt;/span&gt;
	&lt;div class=&#34;video-player-pre&#34;&gt;&lt;/div&gt;
	&lt;section class=&#34;video-player&#34;&gt;
	&lt;div
id=&#34;i4x-MITProfessionalX-6_BD_2X-video-8c7d1d72264046d096e3ce0e45ca0ca3&#34;&gt;&lt;/div&gt;
	&lt;h3 class=&#34;hidden&#34;&gt;No playable video sources
found.&lt;/h3&gt;
	&lt;/section&gt;
	&lt;div class=&#34;video-player-post&#34;&gt;&lt;/div&gt;
	&lt;section class=&#34;video-controls is-hidden&#34;&gt;
	&lt;div class=&#34;slider&#34; title=&#34;Video
position&#34;&gt;&lt;/div&gt;
	&lt;div&gt;
	&lt;ul class=&#34;vcr&#34;&gt;
	&lt;li&gt;&lt;a class=&#34;video_control&#34; href=&#34;#&#34;
title=&#34;Play&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34;&gt;&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;div class=&#34;vidtime&#34;&gt;0:00 /
0:00&lt;/div&gt;&lt;/li&gt;
	&lt;/ul&gt;
	&lt;div class=&#34;secondary-controls&#34;&gt;
	&lt;div class=&#34;speeds menu-container&#34;&gt;
	&lt;a class=&#34;speed-button&#34; href=&#34;#&#34;
title=&#34;Speeds&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34;&gt;
	&lt;span class=&#34;label&#34;&gt;Speed&lt;/span&gt;
	&lt;span class=&#34;value&#34;&gt;&lt;/span&gt;
	&lt;/a&gt;
	&lt;ol class=&#34;video-speeds menu&#34; role=&#34;menu&#34;&gt;&lt;/ol&gt;
	&lt;/div&gt;
	&lt;div class=&#34;volume&#34;&gt;
	&lt;a href=&#34;#&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34; title=&#34;Volume&#34;
aria-label=&#34;Click on this button to mute or unmute this video or
press UP or DOWN buttons to increase or decrease volume
level.&#34;&gt;&lt;/a&gt;
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class=&#34;volume-slider-container&#34;&gt;
	&lt;div class=&#34;volume-slider&#34;&gt;&lt;/div&gt;
	&lt;/div&gt;
	&lt;/div&gt;
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browser&#34; role=&#34;button&#34; aria-disabled=&#34;false&#34;&gt;Fill
browser&lt;/a&gt;
	&lt;a href=&#34;#&#34; class=&#34;quality-control is-hidden&#34;
title=&#34;HD off&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34;&gt;HD off&lt;/a&gt;

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off captions&#34; role=&#34;button&#34;
aria-disabled=&#34;false&#34;&gt;Turn off captions&lt;/a&gt;
	&lt;/div&gt;
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	&lt;/div&gt;
	&lt;/section&gt;
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to end of transcript.&lt;/a&gt;
	&lt;/article&gt;

	&lt;ol id=&#34;transcript-captions&#34; class=&#34;subtitles&#34;
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back to start of transcript.&lt;/a&gt;

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	&lt;li class=&#34;a11y-menu-item active&#34;&gt;

	&lt;a class=&#34;a11y-menu-item-link&#34; href=&#34;#srt&#34;
title=&#34;SubRip (.srt) file&#34; data-value=&#34;srt&#34;&gt;
	SubRip (.srt) file
	&lt;/a&gt;
	&lt;/li&gt;
	&lt;li class=&#34;a11y-menu-item&#34;&gt;

	&lt;a class=&#34;a11y-menu-item-link&#34; href=&#34;#txt&#34;
title=&#34;Text (.txt) file&#34; data-value=&#34;txt&#34;&gt;
	Text (.txt) file
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	&lt;/ul&gt;
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	&lt;/div&gt;

	&lt;/div&gt;
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	&lt;/div&gt;

	</div>
	<div id="seq_contents_10"
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	&lt;h2&gt;Video 3.1.11&lt;/h2&gt;

	&lt;div
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